AL-Juboori , Amer Abdullah, and Abdullah Mohammad Salem. “EFFECT OF SPRAY HUMIC ACID ON THE YIELD AND QUALITY OF TWO CULTIVARS POTATOES . ”. Diyala Agricultural Sciences Journal 3, no. 2 (December 30, 2011): 712–721. Accessed May 16, 2026. https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/3076.